how can i get a copy of a receipt for a tv i bought from walmart?

Call customer service and they should be able to help you with that

If you call the 800 customer service number and used a credit or debit card all you need is the store address and date to get an email copy. Or if you use fetch you can pull up the receipt

Customer Service should be able to retrieve it. Bring the credit or debit card you used.

You should be able to iron you used a debit or credit card